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Message-ID: <mb61pseoiz1cq.fsf@kernel.org>
Date: Thu, 13 Feb 2025 08:37:57 +0000
From: Puranjay Mohan <puranjay@...nel.org>
To: Song Liu <song@...nel.org>
Cc: Indu Bhagat <indu.bhagat@...cle.com>, Weinan Liu <wnliu@...gle.com>,
Josh Poimboeuf <jpoimboe@...nel.org>, Steven Rostedt
<rostedt@...dmis.org>, Peter Zijlstra <peterz@...radead.org>, Mark Rutland
<mark.rutland@....com>, roman.gushchin@...ux.dev, Will Deacon
<will@...nel.org>, Ian Rogers <irogers@...gle.com>,
linux-toolchains@...r.kernel.org, linux-kernel@...r.kernel.org,
live-patching@...r.kernel.org, joe.lawrence@...hat.com,
linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH 0/8] unwind, arm64: add sframe unwinder for kernel
Song Liu <song@...nel.org> writes:
> On Wed, Feb 12, 2025 at 11:26 PM Puranjay Mohan <puranjay@...nel.org> wrote:
>>
>> Song Liu <song@...nel.org> writes:
>>
>> > On Wed, Feb 12, 2025 at 4:10 PM Indu Bhagat <indu.bhagat@...cle.com> wrote:
>> >>
>> >> On 2/12/25 3:32 PM, Song Liu wrote:
>> >> > I run some tests with this set and my RFC set [1]. Most of
>> >> > the test is done with kpatch-build. I tested both Puranjay's
>> >> > version [3] and my version [4].
>> >> >
>> >> > For gcc 14.2.1, I have seen the following issue with this
>> >> > test [2]. This happens with both upstream and 6.13.2.
>> >> > The livepatch loaded fine, but the system spilled out the
>> >> > following warning quickly.
>> >> >
>> >>
>> >> In presence of the issue
>> >> https://sourceware.org/bugzilla/show_bug.cgi?id=32666, I'd expect bad
>> >> data in SFrame section. Which may be causing this symptom?
>> >>
>> >> To be clear, the issue affects loaded kernel modules. I cannot tell for
>> >> certain - is there module loading involved in your test ?
>> >
>> > The KLP is a module, I guess that is also affected?
>> >
>> > During kpatch-build, we added some logic to drop the .sframe section.
>> > I guess this is wrong, as we need the .sframe section when we apply
>> > the next KLP. However, I don't think the issue is caused by missing
>> > .sframe section.
>>
>> Hi, I did the same testing and did not get the Warning.
>>
>> I am testing on the 6.12.11 kernel with GCC 11.4.1.
>
> Could you please also try kernel 6.13.2?
>
I have tested with 6.13.2, here are the results:
[ec2-user@...172-31-32-86 ~]$ uname -r
6.13.2+
My tree looks like:
[ec2-user@...172-31-32-86 linux-upstream]$ git log --oneline
bdf4086dd (HEAD) arm64: Enable livepatch for ARM64
3904c7058 arm64: Define TIF_PATCH_PENDING for livepatch
b5de442a9 unwind: arm64: add reliable stacktrace support for arm64
fdc243fa8 unwind: arm64: Add sframe unwinder on arm64
87681b7c0 unwind: Implement generic sframe unwinder library
c8833ba50 unwind: add sframe v2 header
f3f3863cf arm64: entry: add unwind info for various kernel entries
57ab97f05 unwind: build kernel with sframe info
0da4b4b84 Linux 6.13.2
I have also fixed the 87681b7c0 ("unwind: Implement generic sframe
unwinder library")
with:
--- >8 ---
diff --git a/kernel/sframe_lookup.c b/kernel/sframe_lookup.c
index 846f1da95d89..28bec5064dc7 100644
--- a/kernel/sframe_lookup.c
+++ b/kernel/sframe_lookup.c
@@ -82,7 +82,7 @@ static struct sframe_fde *find_fde(const struct sframe_table *tbl, unsigned long
if (f >= tbl->sfhdr_p->num_fdes || f < 0)
return NULL;
fdep = tbl->fde_p + f;
- if (ip < fdep->start_addr || ip >= fdep->start_addr + fdep->size)
+ if (ip < fdep->start_addr || ip > fdep->start_addr + fdep->size)
return NULL;
return fdep;
@@ -106,7 +106,7 @@ static int find_fre(const struct sframe_table *tbl, unsigned long pc,
else
ip_off = (int32_t)(pc - (unsigned long)tbl->sfhdr_p) - fdep->start_addr;
- if (ip_off < 0 || ip_off >= fdep->size)
+ if (ip_off < 0 || ip_off > fdep->size)
return -EINVAL;
/*
--- 8< ---
GCC is gcc (GCC) 11.4.1 20230605 (Red Hat 11.4.1-2)
kpatch is from https://github.com/puranjaymohan/kpatch/tree/arm64_wip
I run the with following:
./kpatch/kpatch-build/kpatch-build --non-replace -d -v \
linux-upstream/vmlinux -s linux-upstream/ -c linux-upstream/.config \
kpatch/test/integration/linux-6.2.0/special-static.patch
and my dmesg output is:
[ec2-user@...172-31-32-86 ~]$ sudo dmesg
[ 167.202596] livepatch_special_static: loading out-of-tree module taints kernel.
[ 167.203217] livepatch_special_static: tainting kernel with TAINT_LIVEPATCH
[ 167.203760] livepatch_special_static: module verification failed: signature and/or required key missing - tainting kernel
[ 167.205659] livepatch: enabling patch 'livepatch_special_static'
[ 167.207358] livepatch: 'livepatch_special_static': starting patching transition
[ 168.264901] livepatch: 'livepatch_special_static': patching complete
[ 410.641806] livepatch: 'livepatch_special_static': starting unpatching transition
[ 412.389369] livepatch: 'livepatch_special_static': unpatching complete
I even ran stress-ng with the livepatch loaded to see if something
happens.
P.S. - The livepatch doesn't have copy_process() but only copy_signal(),
yours had copy_process() somehow.
Here is the symbol table of the .ko
Symbol table '.symtab' contains 169 entries:
Num: Value Size Type Bind Vis Ndx Name
0: 0000000000000000 0 NOTYPE LOCAL DEFAULT UND
1: 0000000000000000 0 SECTION LOCAL DEFAULT 1 .note.gnu.build-id
2: 0000000000000000 0 SECTION LOCAL DEFAULT 2 .note.Linux
3: 0000000000000000 0 SECTION LOCAL DEFAULT 3 .text
4: 0000000000000000 0 SECTION LOCAL DEFAULT 5 .exit.text
5: 0000000000000000 0 SECTION LOCAL DEFAULT 7 .init.text
6: 0000000000000000 0 SECTION LOCAL DEFAULT 9 .text.copy_signal
7: 0000000000000000 0 SECTION LOCAL DEFAULT 11 .text.kpatch_foo
8: 0000000000000000 0 SECTION LOCAL DEFAULT 13 .altinstructions
9: 0000000000000000 0 SECTION LOCAL DEFAULT 15 __patchable_function_entries
10: 0000000000000000 0 SECTION LOCAL DEFAULT 17 .codetag.alloc_tags
11: 0000000000000000 0 SECTION LOCAL DEFAULT 18 .plt
12: 0000000000000000 0 SECTION LOCAL DEFAULT 19 .init.plt
13: 0000000000000000 0 SECTION LOCAL DEFAULT 20 .text.ftrace_trampoline
14: 0000000000000000 0 SECTION LOCAL DEFAULT 21 .rodata.str1.8
15: 0000000000000000 0 SECTION LOCAL DEFAULT 22 .modinfo
16: 0000000000000000 0 SECTION LOCAL DEFAULT 23 .sframe
17: 0000000000000000 0 SECTION LOCAL DEFAULT 25 .rodata.trace_raw_output_task_newtask.str1.8
18: 0000000000000000 0 SECTION LOCAL DEFAULT 26 .rodata.trace_raw_output_task_rename.str1.8
19: 0000000000000000 0 SECTION LOCAL DEFAULT 27 .rodata.sighand_ctor.str1.8
20: 0000000000000000 0 SECTION LOCAL DEFAULT 28 .rodata.str
21: 0000000000000000 0 SECTION LOCAL DEFAULT 29 .rodata.__mmdrop.str1.8
22: 0000000000000000 0 SECTION LOCAL DEFAULT 30 .rodata.copy_signal.str1.8
23: 0000000000000000 0 SECTION LOCAL DEFAULT 31 .rodata.mm_init.str1.8
24: 0000000000000000 0 SECTION LOCAL DEFAULT 32 .rodata.vm_area_alloc.str1.8
25: 0000000000000000 0 SECTION LOCAL DEFAULT 33 .rodata.dup_mmap.str1.8
26: 0000000000000000 0 SECTION LOCAL DEFAULT 34 .rodata.copy_process.str1.8
27: 0000000000000000 0 SECTION LOCAL DEFAULT 35 .rodata.kernel_clone.str1.8
28: 0000000000000000 0 SECTION LOCAL DEFAULT 36 .rodata.str__task__trace_system_name
29: 0000000000000000 0 SECTION LOCAL DEFAULT 37 .kpatch.strings
30: 0000000000000000 0 SECTION LOCAL DEFAULT 38 .kpatch.funcs
31: 0000000000000000 0 SECTION LOCAL DEFAULT 40 __versions
32: 0000000000000000 0 SECTION LOCAL DEFAULT 41 .bss
33: 0000000000000000 0 SECTION LOCAL DEFAULT 42 .bss.__key.4
34: 0000000000000000 0 SECTION LOCAL DEFAULT 43 .bss.__key.5
35: 0000000000000000 0 SECTION LOCAL DEFAULT 44 .bss.__key.6
36: 0000000000000000 0 SECTION LOCAL DEFAULT 45 .note.GNU-stack
37: 0000000000000000 0 SECTION LOCAL DEFAULT 46 .comment
38: 0000000000000000 0 SECTION LOCAL DEFAULT 47 .data
39: 0000000000000000 0 SECTION LOCAL DEFAULT 49 .exit.data
40: 0000000000000000 0 SECTION LOCAL DEFAULT 51 .init.data
41: 0000000000000000 0 SECTION LOCAL DEFAULT 53 .kpatch.callbacks.pre_patch
42: 0000000000000000 0 SECTION LOCAL DEFAULT 54 .kpatch.callbacks.post_patch
43: 0000000000000000 0 SECTION LOCAL DEFAULT 55 .kpatch.callbacks.pre_unpatch
44: 0000000000000000 0 SECTION LOCAL DEFAULT 56 .kpatch.callbacks.post_unpatch
45: 0000000000000000 0 SECTION LOCAL DEFAULT 57 .kpatch.force
46: 0000000000000000 0 SECTION LOCAL DEFAULT 58 .gnu.linkonce.this_module
47: 0000000000000000 0 SECTION LOCAL DEFAULT 60 .debug_info
48: 0000000000000000 0 SECTION LOCAL DEFAULT 62 .debug_abbrev
49: 0000000000000000 0 SECTION LOCAL DEFAULT 63 .debug_loc
50: 0000000000000000 0 SECTION LOCAL DEFAULT 65 .debug_aranges
51: 0000000000000000 0 SECTION LOCAL DEFAULT 67 .debug_ranges
52: 0000000000000000 0 SECTION LOCAL DEFAULT 69 .debug_line
53: 0000000000000000 0 SECTION LOCAL DEFAULT 71 .debug_str
54: 0000000000000000 0 SECTION LOCAL DEFAULT 72 .debug_frame
55: 0000000000000000 0 FILE LOCAL DEFAULT ABS module-common.c
56: 0000000000000062 52 OBJECT LOCAL DEFAULT 22 __UNIQUE_ID_vermagic547
57: 0000000000000000 0 NOTYPE LOCAL DEFAULT 2 $d
58: 0000000000000000 24 OBJECT LOCAL DEFAULT 2 _note_19
59: 0000000000000018 52 OBJECT LOCAL DEFAULT 2 _note_18
60: 0000000000000000 0 FILE LOCAL DEFAULT ABS patch-hook.c
61: 0000000000000000 0 NOTYPE LOCAL DEFAULT 3 $x
62: 0000000000000000 0 NOTYPE LOCAL DEFAULT 15 $d
63: 0000000000000008 104 FUNC LOCAL DEFAULT 3 patch_free_livepatch
64: 0000000000000000 0 NOTYPE LOCAL DEFAULT 5 $x
65: 0000000000000000 36 FUNC LOCAL DEFAULT 5 patch_exit
66: 0000000000000078 260 FUNC LOCAL DEFAULT 3 patch_free_scaffold
67: 0000000000000000 0 NOTYPE LOCAL DEFAULT 21 $d
68: 0000000000000188 280 FUNC LOCAL DEFAULT 3 patch_find_object_by_name
69: 00000000000002a8 432 FUNC LOCAL DEFAULT 3 add_callbacks_to_patch_objects
70: 0000000000000000 0 NOTYPE LOCAL DEFAULT 7 $x
71: 0000000000000008 584 FUNC LOCAL DEFAULT 7 patch_init
72: 0000000000000000 0 NOTYPE LOCAL DEFAULT 47 $d
73: 0000000000000000 16 OBJECT LOCAL DEFAULT 47 patch_objects
74: 0000000000000000 0 NOTYPE LOCAL DEFAULT 41 $d
75: 0000000000000000 8 OBJECT LOCAL DEFAULT 41 lpatch
76: 0000000000000008 4 OBJECT LOCAL DEFAULT 41 patch_objects_nr
77: 0000000000000000 0 NOTYPE LOCAL DEFAULT 49 $d
78: 0000000000000000 8 OBJECT LOCAL DEFAULT 49 __UNIQUE_ID___addressable_cleanup_module737
79: 0000000000000000 0 NOTYPE LOCAL DEFAULT 51 $d
80: 0000000000000000 8 OBJECT LOCAL DEFAULT 51 __UNIQUE_ID___addressable_init_module736
81: 0000000000000000 12 OBJECT LOCAL DEFAULT 22 __UNIQUE_ID_livepatch739
82: 000000000000000c 12 OBJECT LOCAL DEFAULT 22 __UNIQUE_ID_license738
83: 0000000000000000 0 FILE LOCAL DEFAULT ABS fork.c
84: 0000000000000008 496 FUNC LOCAL DEFAULT 9 copy_signal
85: 0000000000000000 0 NOTYPE LOCAL DEFAULT 25 $d
86: 0000000000000000 0 NOTYPE LOCAL DEFAULT 26 $d
87: 0000000000000000 0 NOTYPE LOCAL DEFAULT 27 $d
88: 0000000000000000 0 NOTYPE LOCAL DEFAULT 29 $d
89: 0000000000000000 0 NOTYPE LOCAL DEFAULT 30 $d
90: 0000000000000000 0 NOTYPE LOCAL DEFAULT 31 $d
91: 0000000000000000 0 NOTYPE LOCAL DEFAULT 32 $d
92: 0000000000000000 0 NOTYPE LOCAL DEFAULT 33 $d
93: 0000000000000128 0 NOTYPE LOCAL DEFAULT 21 $d
94: 0000000000000000 0 NOTYPE LOCAL DEFAULT 34 $d
95: 0000000000000000 0 NOTYPE LOCAL DEFAULT 35 $d
96: 0000000000000000 0 OBJECT LOCAL DEFAULT 42 __key.4
97: 0000000000000000 0 OBJECT LOCAL DEFAULT 43 __key.5
98: 0000000000000000 0 OBJECT LOCAL DEFAULT 44 __key.6
99: 0000000000000000 5 OBJECT LOCAL DEFAULT 36 str__task__trace_system_name
100: 0000000000000000 0 NOTYPE LOCAL DEFAULT 36 $d
101: 0000000000000000 0 NOTYPE LOCAL DEFAULT 28 .L14472^B1
102: 000000000000000e 0 NOTYPE LOCAL DEFAULT 28 .L14472^B2
103: 000000000000001c 0 NOTYPE LOCAL DEFAULT 28 .L14472^B3
104: 000000000000002a 0 NOTYPE LOCAL DEFAULT 28 .L14472^B4
105: 0000000000000038 0 NOTYPE LOCAL DEFAULT 28 .L14472^B5
106: 0000000000000046 0 NOTYPE LOCAL DEFAULT 28 .L14472^B6
107: 0000000000000054 0 NOTYPE LOCAL DEFAULT 28 .L14472^B7
108: 0000000000000062 0 NOTYPE LOCAL DEFAULT 28 .L14472^B8
109: 0000000000000070 0 NOTYPE LOCAL DEFAULT 28 .L14472^B9
110: 000000000000007e 0 NOTYPE LOCAL DEFAULT 28 .L14472^B10
111: 000000000000008c 0 NOTYPE LOCAL DEFAULT 28 .L14472^B11
112: 00000000000000a9 0 NOTYPE LOCAL DEFAULT 28 .L14472^B12
113: 00000000000000c1 0 NOTYPE LOCAL DEFAULT 28 .L14472^B13
114: 00000000000000d9 0 NOTYPE LOCAL DEFAULT 28 .L14472^B14
115: 00000000000000f1 0 NOTYPE LOCAL DEFAULT 28 .L14472^B15
116: 0000000000000109 0 NOTYPE LOCAL DEFAULT 28 .L14472^B16
117: 0000000000000124 0 NOTYPE LOCAL DEFAULT 28 .L14472^B17
118: 0000000000000132 0 NOTYPE LOCAL DEFAULT 28 .L14472^B18
119: 000000000000014d 0 NOTYPE LOCAL DEFAULT 28 .L14472^B19
120: 0000000000000168 0 NOTYPE LOCAL DEFAULT 28 .L14472^B20
121: 0000000000000000 0 FILE LOCAL DEFAULT ABS livepatch-special-static.mod.c
122: 0000000000000000 0 NOTYPE LOCAL DEFAULT 58 $d
123: 0000000000000018 35 OBJECT LOCAL DEFAULT 22 __UNIQUE_ID_srcversion549
124: 000000000000003b 9 OBJECT LOCAL DEFAULT 22 __UNIQUE_ID_depends548
125: 0000000000000044 30 OBJECT LOCAL DEFAULT 22 __UNIQUE_ID_name547
126: 0000000000000000 0 NOTYPE LOCAL DEFAULT 40 $d
127: 0000000000000000 0 OBJECT LOCAL DEFAULT OS [0xff20] .klp.sym.vmlinux.signal_cachep,1
128: 0000000000000000 1216 OBJECT LOCAL DEFAULT 40 ____versions
129: 0000000000000000 0 NOTYPE GLOBAL DEFAULT 55 __kpatch_callbacks_pre_unpatch_end
130: 0000000000000000 0 NOTYPE GLOBAL DEFAULT UND __init_rwsem
131: 0000000000000000 0 NOTYPE GLOBAL DEFAULT UND __list_add_valid_or_report
132: 0000000000000000 0 NOTYPE GLOBAL DEFAULT UND __kmalloc_noprof
133: 0000000000000000 1344 OBJECT GLOBAL DEFAULT 58 __this_module
134: 0000000000000000 0 NOTYPE GLOBAL DEFAULT 54 __kpatch_callbacks_post_patch
135: 0000000000000000 0 NOTYPE GLOBAL DEFAULT 57 __kpatch_force_funcs
136: 0000000000000000 0 NOTYPE GLOBAL DEFAULT 17 __stop_alloc_tags
137: 0000000000000000 0 NOTYPE GLOBAL DEFAULT UND hrtimer_init
138: 0000000000000000 36 FUNC GLOBAL DEFAULT 5 cleanup_module
139: 0000000000000000 0 NOTYPE GLOBAL DEFAULT UND memcpy
140: 0000000000000000 0 NOTYPE GLOBAL DEFAULT UND klp_enable_patch
141: 0000000000000000 0 NOTYPE GLOBAL DEFAULT UND kfree
142: 0000000000000000 0 NOTYPE GLOBAL DEFAULT 53 __kpatch_callbacks_pre_patch
143: 0000000000000008 584 FUNC GLOBAL DEFAULT 7 init_module
144: 0000000000000000 0 NOTYPE GLOBAL DEFAULT 55 __kpatch_callbacks_pre_unpatch
145: 0000000000000000 0 NOTYPE GLOBAL DEFAULT 17 __start_alloc_tags
146: 0000000000000000 0 NOTYPE GLOBAL DEFAULT 38 __kpatch_funcs
147: 0000000000000000 0 NOTYPE GLOBAL DEFAULT UND _printk
148: 0000000000000000 0 NOTYPE GLOBAL DEFAULT 57 __kpatch_force_funcs_end
149: 0000000000000000 0 NOTYPE GLOBAL DEFAULT UND queued_spin_lock_slowpath
150: 0000000000000038 0 NOTYPE GLOBAL DEFAULT 38 __kpatch_funcs_end
151: 0000000000000000 0 NOTYPE GLOBAL DEFAULT 54 __kpatch_callbacks_post_patch_end
152: 0000000000000000 0 NOTYPE GLOBAL DEFAULT 53 __kpatch_callbacks_pre_patch_end
153: 0000000000000000 0 NOTYPE GLOBAL DEFAULT UND __list_del_entry_valid_or_report
154: 0000000000000000 0 NOTYPE GLOBAL DEFAULT UND __mutex_init
155: 0000000000000008 60 FUNC GLOBAL DEFAULT 11 kpatch_foo
156: 0000000000000000 0 NOTYPE GLOBAL DEFAULT 56 __kpatch_callbacks_post_unpatch_end
157: 0000000000000000 0 NOTYPE GLOBAL DEFAULT UND kmem_cache_alloc_noprof
158: 0000000000000000 0 NOTYPE GLOBAL DEFAULT UND __init_waitqueue_head
159: 0000000000000000 0 NOTYPE GLOBAL DEFAULT UND strcmp
160: 0000000000000000 0 NOTYPE GLOBAL DEFAULT UND jiffies
161: 0000000000000000 0 NOTYPE GLOBAL DEFAULT 56 __kpatch_callbacks_post_unpatch
162: 0000000000000000 0 NOTYPE GLOBAL DEFAULT UND __kmalloc_cache_noprof
163: 0000000000000000 0 NOTYPE GLOBAL DEFAULT UND alt_cb_patch_nops
164: 0000000000000000 0 NOTYPE GLOBAL DEFAULT UND kmalloc_caches
165: 0000000000000000 0 NOTYPE GLOBAL DEFAULT OS [0xff20] .klp.sym.vmlinux.it_real_fn,0
166: 0000000000000000 0 NOTYPE GLOBAL DEFAULT OS [0xff20] .klp.sym.vmlinux.posix_cputimers_group_init,0
167: 0000000000000000 0 NOTYPE GLOBAL DEFAULT OS [0xff20] .klp.sym.vmlinux.tty_audit_fork,0
168: 0000000000000000 0 NOTYPE GLOBAL DEFAULT OS [0xff20] .klp.sym.vmlinux.sched_autogroup_fork,0
and Sections:
[ec2-user@...172-31-32-86 ~]$ readelf -WS livepatch-special-static.ko
There are 78 section headers, starting at offset 0x1727d8:
Section Headers:
[Nr] Name Type Address Off Size ES Flg Lk Inf Al
[ 0] NULL 0000000000000000 000000 000000 00 0 0 0
[ 1] .note.gnu.build-id NOTE 0000000000000000 000040 000024 00 A 0 0 4
[ 2] .note.Linux NOTE 0000000000000000 000064 00004c 00 A 0 0 4
[ 3] .text PROGBITS 0000000000000000 0000c0 000458 00 AX 0 0 32
[ 4] .rela.text RELA 0000000000000000 000518 000570 18 I 74 3 8
[ 5] .exit.text PROGBITS 0000000000000000 000a88 000024 00 AX 0 0 8
[ 6] .rela.exit.text RELA 0000000000000000 000ab0 000048 18 I 74 5 8
[ 7] .init.text PROGBITS 0000000000000000 000b00 000250 00 AX 0 0 32
[ 8] .rela.init.text RELA 0000000000000000 000d50 000348 18 I 74 7 8
[ 9] .text.copy_signal PROGBITS 0000000000000000 001098 0001f8 00 AX 0 0 8
[10] .rela.text.copy_signal RELA 0000000000000000 001290 000240 18 I 74 9 8
[11] .text.kpatch_foo PROGBITS 0000000000000000 0014d0 000044 00 AX 0 0 8
[12] .rela.text.kpatch_foo RELA 0000000000000000 001518 000078 18 I 74 11 8
[13] .altinstructions PROGBITS 0000000000000000 001590 00000c 00 A 0 0 8
[14] .rela.altinstructions RELA 0000000000000000 0015a0 000030 18 I 74 13 8
[15] __patchable_function_entries PROGBITS 0000000000000010 0015d0 000038 00 WAL 3 0 8
[16] .rela__patchable_function_entries RELA 0000000000000000 001608 0000a8 18 I 74 15 8
[17] .codetag.alloc_tags PROGBITS 0000000000000540 0016b0 000000 00 W 0 0 1
[18] .plt PROGBITS 0000000000000000 0016b0 000001 00 AX 0 0 1
[19] .init.plt PROGBITS 0000000000000000 0016b1 000001 00 A 0 0 1
[20] .text.ftrace_trampoline PROGBITS 0000000000000000 0016b2 000001 00 AX 0 0 1
[21] .rodata.str1.8 PROGBITS 0000000000000000 0016b8 000455 01 AMS 0 0 8
[22] .modinfo PROGBITS 0000000000000000 001b0d 000096 00 A 0 0 1
[23] .sframe PROGBITS 0000000000000000 001ba8 0001ad 00 A 0 0 8
[24] .rela.sframe RELA 0000000000000000 001d58 0000c0 18 I 74 23 8
[25] .rodata.trace_raw_output_task_newtask.str1.8 PROGBITS 0000000000000000 001e18 000032 01 AMS 0 0 8
[26] .rodata.trace_raw_output_task_rename.str1.8 PROGBITS 0000000000000000 001e50 000030 01 AMS 0 0 8
[27] .rodata.sighand_ctor.str1.8 PROGBITS 0000000000000000 001e80 000017 01 AMS 0 0 8
[28] .rodata.str PROGBITS 0000000000000000 001e97 000180 01 AMS 0 0 1
[29] .rodata.__mmdrop.str1.8 PROGBITS 0000000000000000 002018 00006b 01 AMS 0 0 8
[30] .rodata.copy_signal.str1.8 PROGBITS 0000000000000000 002088 00005f 01 AMS 0 0 8
[31] .rodata.mm_init.str1.8 PROGBITS 0000000000000000 0020e8 00000f 01 AMS 0 0 8
[32] .rodata.vm_area_alloc.str1.8 PROGBITS 0000000000000000 0020f8 000014 01 AMS 0 0 8
[33] .rodata.dup_mmap.str1.8 PROGBITS 0000000000000000 002110 000054 01 AMS 0 0 8
[34] .rodata.copy_process.str1.8 PROGBITS 0000000000000000 002168 000017 01 AMS 0 0 8
[35] .rodata.kernel_clone.str1.8 PROGBITS 0000000000000000 002180 000009 01 AMS 0 0 8
[36] .rodata.str__task__trace_system_name PROGBITS 0000000000000000 002190 000005 00 A 0 0 8
[37] .kpatch.strings PROGBITS 0000000000000000 002195 00006c 00 A 0 0 1
[38] .kpatch.funcs PROGBITS 0000000000000000 002208 000038 00 A 0 0 8
[39] .rela.kpatch.funcs RELA 0000000000000000 002240 000048 18 I 74 38 8
[40] __versions PROGBITS 0000000000000000 002288 0004c0 00 A 0 0 8
[41] .bss NOBITS 0000000000000000 002748 00000c 00 WA 0 0 8
[42] .bss.__key.4 NOBITS 0000000000000000 002748 000000 00 WA 0 0 8
[43] .bss.__key.5 NOBITS 0000000000000000 002748 000000 00 WA 0 0 8
[44] .bss.__key.6 NOBITS 0000000000000000 002748 000000 00 WA 0 0 8
[45] .note.GNU-stack PROGBITS 0000000000000000 002748 000000 00 0 0 1
[46] .comment PROGBITS 0000000000000000 002748 00008d 01 MS 0 0 1
[47] .data PROGBITS 0000000000000048 0027d8 000010 00 WA 0 0 8
[48] .rela.data RELA 0000000000000000 0027e8 000030 18 I 74 47 8
[49] .exit.data PROGBITS 0000000000000000 002818 000008 00 WA 0 0 8
[50] .rela.exit.data RELA 0000000000000000 002820 000018 18 I 74 49 8
[51] .init.data PROGBITS 0000000000000000 002838 000008 00 WA 0 0 8
[52] .rela.init.data RELA 0000000000000000 002840 000018 18 I 74 51 8
[53] .kpatch.callbacks.pre_patch PROGBITS 0000000000000000 002858 000008 00 WA 0 0 1
[54] .kpatch.callbacks.post_patch PROGBITS 0000000000000000 002860 000008 00 WA 0 0 1
[55] .kpatch.callbacks.pre_unpatch PROGBITS 0000000000000000 002868 000008 00 WA 0 0 1
[56] .kpatch.callbacks.post_unpatch PROGBITS 0000000000000000 002870 000008 00 WA 0 0 1
[57] .kpatch.force PROGBITS 0000000000000000 002878 000008 00 WA 0 0 1
[58] .gnu.linkonce.this_module PROGBITS 0000000000000000 002880 000540 00 WA 0 0 64
[59] .rela.gnu.linkonce.this_module RELA 0000000000000000 002dc0 000030 18 I 74 58 8
[60] .debug_info PROGBITS 0000000000000000 002df0 06041d 00 0 0 1
[61] .rela.debug_info RELA 0000000000000000 063210 08a390 18 I 74 60 8
[62] .debug_abbrev PROGBITS 0000000000000000 0ed5a0 002392 00 0 0 1
[63] .debug_loc PROGBITS 0000000000000000 0ef932 031dd6 00 0 0 1
[64] .rela.debug_loc RELA 0000000000000000 121708 004e30 18 I 74 63 8
[65] .debug_aranges PROGBITS 0000000000000000 126538 000740 00 0 0 1
[66] .rela.debug_aranges RELA 0000000000000000 126c78 0000d8 18 I 74 65 8
[67] .debug_ranges PROGBITS 0000000000000000 126d50 00a870 00 0 0 1
[68] .rela.debug_ranges RELA 0000000000000000 1315c0 001320 18 I 74 67 8
[69] .debug_line PROGBITS 0000000000000000 1328e0 010623 00 0 0 1
[70] .rela.debug_line RELA 0000000000000000 142f08 000078 18 I 74 69 8
[71] .debug_str PROGBITS 0000000000000000 142f80 02b764 01 MS 0 0 1
[72] .debug_frame PROGBITS 0000000000000000 16e6e8 001900 00 0 0 8
[73] .rela.debug_frame RELA 0000000000000000 16ffe8 000b28 18 I 74 72 8
[74] .symtab SYMTAB 0000000000000000 170b10 000fd8 18 75 129 8
[75] .strtab STRTAB 0000000000000000 171ae8 0006cc 00 0 0 1
[76] .shstrtab STRTAB 0000000000000000 1721b4 000576 00 0 0 1
[77] .klp.rela.vmlinux..text.copy_signal RELA 0000000000000000 172730 0000a8 18 AIo 74 9 8
Thanks,
Puranjay
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